Vitamin D Metabolism and Deficiency Symptoms
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Questions and Answers

What is the primary function of 1,25 Dihydroxy cholecalciferol?

  • To increase 24-hydroxylase
  • To decrease Calcidiol
  • To increase Calcidiol (correct)
  • To decrease 24-hydroxylase

    • Where does the decrease in 24-hydroxylase occur as a result of 1,25 Dihydroxy cholecalciferol?

  • Bone plates
  • Ribs and sternum
  • Ileum
  • Jejunum (correct)

    • What is an effect of incomplete development of ribs and sternum as mentioned in the text?

  • Growth outward of skull bones (correct)
  • Groove at 6th ribs
  • Indentation at 6th ribs
  • Prominent forehead

    • Which of the following is a result of the decrease in 24-hydroxylase due to 1,25 Dihydroxy cholecalciferol?

    <p>Increased Calcidiol production</p> Signup and view all the answers

    Where does incomplete development of ribs and sternum lead to unusual features as mentioned in the text?

    <p>In the bone plates</p> Signup and view all the answers

    What is the primary effect of 1,25 Dihydroxy cholecalciferol on bone development as mentioned in the text?

    <p>Enhanced absorption in boneplates</p> Signup and view all the answers

    What is the primary effect of 1,25 Dihydroxy cholecalciferol on bone development?

    <p>Enhancing bone mineralization</p> Signup and view all the answers

    In which locations does 1,25 Dihydroxy cholecalciferol decrease 24-hydroxylase activity?

    <p>Jejunum and ileum</p> Signup and view all the answers

    What is the consequence of incomplete development of ribs and sternum as mentioned in the text?

    <p>Outward growth of skull bones</p> Signup and view all the answers

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